Title :
Sensor interrogation technique using chirped fibre grating based Sagnac loop
Author :
Zhao, Donghui ; Shu, Xuewen ; Zhang, Lin ; Bennion, I.
Author_Institution :
Electron. Eng., Aston Univ., Birmingham, UK
fDate :
3/28/2002 12:00:00 AM
Abstract :
A novel and simple sensor interrogation scheme for fibre Bragg grating (FBG)-based sensing systems is demonstrated. In this scheme, a chirped FBG-based Sagnac loop is used as a wavelength-dependent receiver, and a stable and linear readout response is realised. It is a significant advantage of this scheme that the sensitivity and the measurement wavelength range can be easily adjusted by controlling the chirp of the FBG or using an optical delay line in the Sagnac loop
Keywords :
Bragg gratings; chirp modulation; fibre optic sensors; optical delay lines; optical modulation; sensitivity; chirp control; chirped FBG-based Sagnac loop; chirped fibre grating based Sagnac loop; fibre Bragg grating based sensing systems; measurement wavelength range; optical delay line; sensitivity; sensor interrogation technique; stable linear readout response; wavelength dependent receiver;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20020224
